If x≥8 and y≤3 , it must be true that

A x + y ≤5
B x + y ≤11
C x -y ≥5
D x-y ≤5

Correct Answer: x -y ≥5

এখানে x ও y যোগ করে must be true কিনা তা বের হবে না; কারণ ≥8 এবং ≤3 দুটি বিপরীতমুখী রাশি। এখানে y≤3 বা - y≥ - 3 (উভয় পক্ষকে ( - 1) ) দিয়ে গুণ দিলে অসমতায় চিহৃ উল্টে যায়।] এখন   x≥8 - y≥ - 3              + x - y>8 - 3⇒x - y>5;
Bissoy MCQ
#গণিত #City Bank Ltd #City Bank Ltd - Probationary Officer - 2016

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